William tayloe and feank king



(No Model.)

W. TAYLOR & P. KING.

. PLATE EOE BATTERIES. No. 290,611. Patented Dec. 18,1883.

77iinemm jnwziom UNITED STATES I WILLIAM TAYLOR AND FRANK KING, OF LONDON, ENGLAND.

PLATE FOR BATTERIES.

SPECIFICATION forming part of Letters Patent No. 290,611, dated December 18, 1883.

Application filed April 23,1883. (No model.) Patented in England July 18, 1882, No. 3,409, and in France January 15, 1883, No.140,860.

To all whom it may concern..-

Be it known that we, WILLIAM TAYLOR and FRANK KING, both of 67 Strand, London, England, have invented new and useful Plates for Secondary Batteries, (for which we have obtained patents in England, dated July 18, A. D. 1882, No. 3,409, and in France, dated January 15, A. D. 1883, No. 140,860,) of which the following is a specification.

Our invention relates to new forms of plates, being plates for electrodes for secondary batteries or accumulators, which are formed by coiling tapes or strips produced in a new form and by a cheaper, quicker, and better mode of manufacturing than has hitherto been adopted.

In carrying out our invention we form our improved plates by coiling special forms of tapes or bands which are cut out or from the solid by or in alathe or other cutting-machine such as is hereinafter described, in such manner that the surface of the band that does not come in contact with the cutting-tool shall have given to it a roughened or cellulated surface raised by the angle at which the cutting tool is worked.

The plate, constructed by coiling tapes cut in the form above mentioned, is rendered more efficient for the purpose sought to be attained by increasing in and by one operation the extent of surface acted on by the electrolyte. In some cases the tape may be cut thinner in places by adjusting the cutting-tool, as re quired, or a thin tape or tapes may be interposed between thicker ones in making up the plate. The plate is formed by receiving the lead tape direct from the cutting-tool, and winding it (and when needed with interposed thin tapes) round a mandrel provided with cheeks, which may have either flat or corruated surfaces, thereby producing a plate or disk with flat or uneven surfaces. The edges of the coiled tapes are fastened at suitable parts of the plate so produced by being stamped or pressed together, so as to give stability or rigidity to the plate.

The kind of cutting-machine which we find suitable for cutting the tapes or strips of lead in the required form is constructed as follows: When the tape is to be uniform in thickness, we use an ordinary surfacing-lathe, the motion of the slide-rest thereof being adjusted to the thickness required but when we require a tape of varying thicknesses we make the feed-wheel on the slide-rest eccentric, and give the shaft carrying the actuating-worm a rocking as well 5 as rotating motion, and this is readily performed by gearing the shaft carrying the worm into the back gearing of an ordinary lathehead,

such shaft being provided at the lathe-head,

end with a ball-and-socket or other suitable hearing, the end of the shaft working in a sliding journal.

The drawings hereto annexed illustrate more clearly how our invention is to be performed.

Figure 1 is a longitudinal section, and Fig.

2 is a plan, of the improved tape. In these figures, a is the lower or smooth surface, and b is the upper or roughened surface, of the tape. Fig. 3 represents in front elevation a convenient form of plate made up of the improved o tape, the strong diagonal lines representing solder for holding the tapes in position. Fig. 4 represents diagrammatically how the tape is produced.

A circular or other shaped piece of lead- 5 plate, 0, is placed in a lathe, and a cuttingtool, cl, applied as shown, pares or cuts off a strip of lead having a smooth under surface,

a, and a roughened upper surface, I).

Having now described the nature of our in- 8Q vention and the mode of performing it, we do not claim as forming part of our present i11- vention the cutting-machine constructed as described, nor generally the making of plates of lead by coiling tapes or strips of lead hav- 8 ing plane or even surfaces; but

What we claim as our invention is The improvement in the manufacture of plates for secondary batteries or accumulators, consisting in first cutting tapes or bands 0 of lead out of or from the solid in such manner that one of the surfaces thereof has given to it a roughened or cellulated surface, then winding or coiling the said tapes or bands, and

finally securing them together at their edges, 5

all substantially as hereinbefore described.

In testimony whereof we have signed this specification in the presence of two subscribing witnesses.

W. TAYLOR. FRANK KING. \Vitnesses:

H. J. HADDAN, A. E. MnLHUIsn. 

